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A 220 GHz traveling wave tube (TWT) is being developed in our lab. This TWT is based on a folded waveguide circuit with an electron beam focused by periodic permanent magnets (PPMs). To measure the transmission loss of the TWT directly, a prototype without a sever has been built. The maximum output power of this prototype is 1.1 W at 225 GHz. The gain, output power and transmission loss are close...
Compact traveling wave tubes (TWTs) operating at 220 GHz and 340 GHz respectively are being developed. The 220 GHz TWT is designed to produce 10 W output power and has achieved 0.2 W. The 340 GHz TWT is designed to produce 1 W output power and has not been demonstrated yet. This paper describes the development of the TWTs' components and some test results of two TWT prototypes.
In this paper, we fabricate copper high frequency structures for a 220GHz TWT amplifier using UV LIGA technology. The two halves have been assembled and bonded. The measurement results of the folded waveguide circuit show that the attenuation factor of the circuit is 240 dB/m.
A compact folded waveguide traveling-wave tube (TWT) with PPM system operating at 220 GHz with 10 W of output power and 10 GHz bandwidth is being developed. This paper reports the test results of the latest prototype.
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